Bias-induced long-term transient in a-Si:H thin film transistors
Bibliographic record
Abstract
In this work, we have investigated and modeled an anomalous transient behaviour of the hydrogenated amorphous silicon (a-Si:H) thin film transistor (TFT) in a time scale (of the order of hundreds of seconds) where the threshold voltage shift is not prominent. Such a long term transient in the terminal characteristics can be critical in analog applications of the TFT, such as in pixel driver circuits of organic light emitting diode (OLED) displays. The reproducibility of the transient behaviour regardless of the presence or absence of any thermal annealing cycle suggests that the behaviour is not related to the metastable creation of defects in a-Si:H. The underlying mechanism that we believe is a configurational relaxation of Si dangling bond (D) defects after change in their charge states. Other possible effects including the properties of the source and drain contacts are carefully considered. Based on the defect relaxation mechanism, we have proposed a time dependent drain current model to describe the transient response of the TFT in the forward above threshold regime of operation. The parameters associated with the model are physically based and have strong dependence on the TFT geometry. The measurement data are in good agreement with the simulation results with a discrepancy of less than 5%, thus validating the model.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.000 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.001 |
| Open science | 0.001 | 0.000 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.000 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one teacher head, not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".